Rumex hymenosepalus Torr.

Canaigre dock, Canaigre, Desert rhubarb

The Canaigre of western North America as far east as west Texas has smooth stems and leaves and grows 1–3 feet tall. It is commonly seen in streambeds and gulches, though it is also found on well-drained high ground. The tuberous roots are rich in tannin. The large, fleshy, alternate leaves are often a foot long. The flowers bloom in large heads a foot long or more and are followed by large masses of pink-to-reddish-brown seeds.